I had a really nasty virus named Obfuscator.xz which forced me to do a total reset of my Windows. After the reset I started getting these BSOD and they seem to appear at random. Additional info, may be unrelated: After my last reinstall it took at least 1 minute to shut down my computer (normally takes about 5 s), and also took a lot of time to start it up. After I reinstalled my graphic card drivers this problem seems to be gone. Dump File : 062115-5194-01.dmp Crash Time : 2015-06-21 18:51:46 Bug Check String : SYSTEM_SERVICE_EXCEPTION Bug Check Code : 0x0000003b Parameter 1 : 00000000`c0000005 Parameter 2 : fffff880`0f2e52ec Parameter 3 : fffff880`0ab8c950 Parameter 4 : 00000000`00000000 Caused By Driver : atikmdag.sys Caused By Address : atikmdag.sys+b12ec File Description : Product Name : Company : File Version : Processor : x64 Crash Address : ntoskrnl.exe+748c0 Stack Address 1 : Stack Address 2 : Stack Address 3 : Computer Name : Full Path : C:\Windows\Minidump\062115-5194-01.dmp Processors Count : 4 Major Version : 15 Minor Version : 7601 Dump File Size : 278 744 Dump File Time : 2015-06-21 18:52:13 ================================================== What I have tried: -Total reset of Windows 2 times, repair Windows 1 time. Full driver update after each reset. -Updated my drivers. Uninstalled graphic drivers, installed them again. -Did ram test -no errors -Done this in Command Prompt: "sfc.exe /scannow" -no errors -Performed full scan with various antivirus programs and found nothing suspicious. -Tried installing hotfix for this but I can't run the hotfix because of the error message "The update is not applicable to your computer". My computer: OS: Windows 7 Professional 64 bit CPU: Intel Core i5-4690K CPU @ 3.5 GHz Motherboard: ASRock Z97 Anniversary Memory: Corsair Vengeance DDR3 PC12800/1600MHz CL10 LP 2x8GB Graphics card: Asus Radeon R9 290 DirectCU II OC HDMI DP 2xDVI 4GB I have been spending my entire spare time for the last few days but have had no success with the BSOD.