A few days ago, I started a new thread about Windows 8 OS called, “After two weeks with Windows 8, I find it the least stable OS”. http://windows8forums.com/windows-8-discussion/18137-after-two-weeks-windows-8-i-find-least-stable-os-new-post.html My opinion was based on my personal experience using Windows 8 during a two-week period. During that time, I have had five “Refresh your PC”, one reset, and two “clean installations” of Windows 8 on two of my computers. I was very upset about the hours wasted/lost in order to refresh, reset, “clean install”, update, re-install other programs, etc… Of course, I blamed Windows 8 and Microsoft for my debacle. Right now, after receiving numerous replies and doing a lot of reading on Windows 8, I would like to rectify my opinion. I’ve been using Avira as my choice of Antivirus for many years and on many computers with different Windows operating systems; therefore, I knew what do first, upon purchasing a Windows 8 computer – install AVIRA 2013 Antivirus. Within very few days, I had several crashes of Windows 8. First time, I did not pay too much attention to the notes on the Blue screen, but after several crashes I decided to follow Microsoft’s recommendation and searched on-line for “"Bad_Pool_Header". The Internet told me that the culprit was Avira AV. “Currently, the Avira products are not ready for Windows 8 and Windows Server 2012 (Built on Windows 8).” Windows 8 compatibility Next step for me was very simple, if AVIRA could not join the “march of technological progress”, it must go. (Just in case, I was able to uninstall Avira only in Safe Mode. Please be advised.) I’ve been a “secret” fan of BitDefender for a long time and for that reason, I knew my next choice of AV was BitDefender. In order to avoid ANY COMPATIBILITY issues with Win 8, I’ve selected BitDefender Windows 8 Security Antivirus. “Windows 8 Certified Bitdefender 2013 Launches #1 Proven Security Products on Windows Store. Bitdefender 2013, the world’s top-ranked antivirus,is now available through the Windows Store, enhancing Windows security with innovative features such as Bitdefender Safepay™ to protect online shopping and Autopilot to run your security for Windows 8 at maximum effectiveness.” Windows 8 Certified Bitdefender 2013 Launches #1 Proven Security Products on Windows Store Now, I truly believe that the cause of all my Windows 8 problems was/is BitDefender Windows 8 Security Antivirus not Windows 8 OS. (But Windows 8 CERTIFIED BITDEFENDER 2013!) Should I blame (1) Bitdefender for getting Windows 8 certification from Microsoft or (2) Microsoft for giving that certification to BitDefender? One more thing. My problems were initiated by BitDefender AV but exacerbated by Windows 8 default settings – “Turn on Fast Startup (Recommended). “Fast Startup (aka: hybrid boot or hybrid Shutdown) is a new feature in Windows 8 to help your PC start up faster after shutting down. When turned on, Windows 8 does this by using a hybrid shutdown (a partial hibernate) method that saves only the kernal session and device drivers (system information) to the hibernate (hiberfil.sys) file on disk instead of closing it when you shut down your PC. This also makes the hiberfil.sys file to be much smaller than what hibernate would use (often 4GB or more). When you start your PC again, Windows 8 uses that saved system information to resume your system instead of having to do a cold boot to fully restart it. Using this technique with boot gives a significant advantage for boot times, since reading the hiberfile in and reinitializing drivers is much faster on most systems (30-70% faster on most systems tested). If you have a motherboard with UEFI, then fast startup will be even faster.” Because of that feature, anytime I manually used to shut my computer down, Windows 8 was trying to load the “frozen” corrupt system information instead of going the long way and completing its normal full startup sequence. I've immediately turned Fast Startup off and changed my mind about Windows 8 to positive. I did not want to be uncouth and unfair to Microsoft after posting a lot of negative comments about Windows 8; therefore, I decided to publicly express my “updated” opinion about Windows 8.