Qtcore4.dll Error - What is it?
Qtcore4.dll is a dynamic link library file that helps Microsoft Windows in loading several key components of the system. The Qtcore4.dll error occurs when the Qtcore4.dll file cannot be loaded to run the application supported by this .dll file. The Qcore4.dll missing error message may occur while booting your system or launching a certain program. It is a blue screen of death error type. The Qtcore4.dll error code is often displayed as:BLUE SCREEN ERROR - QtCore4.dll Not Found
Filei386QtCore4.dll could not be loaded. The error code is 7. Setup cannot continue. Press any key to exit.
Solution
Error Causes
This error code is triggered by a variety of reasons such as:
- Windows file allocation file gets damaged
- Your computer BIOS (Basic Input/Output System) are misconfigured
- The Qtcore4.dll file gets corrupt
- Registry gets damaged and corrupt
- Non-Microsoft program not running in tandem with Windows
- Malware attack
- Improper hardware driver software
Further Information and Manual Repair
Here are some ways of fixing the Qtcore4.dll error on your system:1. Re-install the Program Causing Qtcore4.dll error message to pop up
As dll files are shared files sometimes due to program deletion and installation .dll file settings can get misconfigured, damaged, and corrupt. In such a scenario, you can try reinstalling the program that is causing Qtcore4.dll error message to appear on the screen.2. Reconfigure your Mis-configured BIOS
If BIOS misconfiguration is the cause of this error code on your system, then try reconfiguring your system’s misconfigured BIOS.- To do this boot the computer and then press the BIOS designated keys to enter the BIOS. The keys may vary from manufacture to manufacture but typically, the setup keys are F2, F10, F12, and Del.
- Once you figure out the setup keys, press them rapidly when booting the computer.
- After successfully hitting the setup keys, the BIOS will load and you will see the BIOS setting menu on your screen. Adjust settings. Go to SATA Operation and change RAID AHCI to RAID ATA. Save changes and then exit.
3. Scan Your PC with a Registry Cleaner and an Antivirus
However, after adjusting the BIOS if the error still pops up on your screen, then this indicates the problem is bigger than you think. It triggers either malware attack or registry corruption. If these are the underlying causes for the Qtcore4.dll error on your system then you need to scan your PC with a registry cleaner and an antivirus. Registry is the main database of your system; if this gets corrupt it is most likely to result in system failure and valuable data loss. And as for malware, the biggest concern is data security threats. Today’s advanced and lethal malware like viruses and spyware can give easy access to hackers to enter your system from a remote location, browse through your confidential and private data and manipulate it to their advantage. This has led to a surge in various types of cyber crime, data breaches, and identity theft cases over the years. To avoid all this while resolving the error code Qtcore4.dll on your PC, registry cleaning and repair and antivirus scan are needed. You can either download 2 separate tools on your system to scan your PC which by the way will take a lot of time and increase your chances of the system slow down or you can download Restoro.Why Restoro?
- Total System Care is an advanced, user-friendly, high, and multi-functional repair.
- It is deployed with a powerful and intuitive registry cleaner. It also functions as a system optimizer. It spares you from downloading numerous tools to address and resolve different errors on your PC.
- It is your one-stop solution for not only Qtcore4.dll problems but practically all PC-related issues.
- The registry cleaner utility detects all the malicious, unnecessary, and obsolete files overloading and corrupting your RAM.
- This includes junk and temporary files. It wipes them out thus clearing your disk space. Simultaneously, it also repairs the damaged and misconfigured dll files including the Qtcore4.dll file, and fixes the corrupt registry.
- The privacy error utility has the properties of an antivirus. It detects and removes malware, viruses adware, and spyware from your system in seconds.
- Total System Care resolves the Qtcore4.dll error on your system and boosts the performance of your system. It has a simple and neat interface which makes it quite easy for users to operate it, even those who are not technically adept.
- It is compatible with all Windows versions

The true cause is that there is no working Border Gateway Protocol (BGP) routes into Facebook's sites. BGP is the standardized exterior gateway protocol used to exchange routing and reachability information between the internet top-level autonomous systems (AS). Most people, indeed most network administrators, never need to deal with BGP.
Cloudflare VP Dane Knecht was the first to report the underlying BGP problem. This meant, as Kevin Beaumont, former Microsoft's Head of Security Operations Centre, tweeted,
"By not having BGP announcements for your DNS name servers, DNS falls apart = nobody can find you on the internet. Same with WhatsApp btw. Facebook has basically de-platformed themselves from their own platform."
Many people are very annoyed by this and with the fact that they cannot use their social media platforms but it seems that Facebook employees are in even bigger annoyance as it was reported that Facebook employees can't enter their buildings because their "smart" badges and doors were also disabled by this network failure. If true, Facebook's people literally can't enter the building to fix things.
Reddit user u/ramenporn, who claimed to be a Facebook employee working on bringing the social network back from the dead, reported, before he deleted his account and his messages:
"DNS for FB services has been affected and this is likely a symptom of the actual issue, and that's that BGP peering with Facebook peering routers has gone down, very likely due to a configuration change that went into effect shortly before the outages happened (started roughly 1540 UTC). There are people now trying to gain access to the peering routers to implement fixes, but the people with physical access is separate from the people with knowledge of how to actually authenticate to the systems and people who know what to actually do, so there is now a logistical challenge with getting all that knowledge unified. Part of this is also due to lower staffing in data centers due to pandemic measures."
Ramenporn also stated that it wasn't an attack, but a mistaken configuration change made via a web interface.
Both BGP and DNS are down, the "connection to the outside world is down, remote access to those tools don't exist anymore, so the emergency procedure is to gain physical access to the peering routers and do all the configuration locally."
Technicians on site don't know how to do that and senior network administrators aren't on site.
It seems that it will all be down for a couple of more hours before the issue is resolved.
Hacker group recently came up with claims that they have stolen data from 100 million T-Mobile customers. T-Mobile has responded with confirmation it has been compromised and that over 40 million records were stolen, among them are not just present customers, but anyone who has applied for T-Mobile service as well as past accounts.
