Hi salty, welcome to the forum. Panda is kind of a resource hog, so it may be causing some conflict, in your computer. I would uninstall it and see if your problems disappear. If the problem disappears, then I would have to suspect Panda. If you want a good AV program, get AVG Free.

Perhaps, you could tell us more about your computer system, so that we can better help you.

Here is a list of programs I recommend people have:
I only list here, the free programs that I have used and I’m satisfied with, I know there are other great programs, but these are just the ones that I use, and can verify, as being worthy.

SYSTEM INVENTORY
Everest: http://www.lavalys.com/products.php?lang=en

SPYWARE
AdAware: http://www.lavasoftusa.com/software/adaware/
Spybot S&D: http://www.safer-networking.org/en/index.html
SpywareBlaster: http://www.javacoolsoftware.com/spywareblaster.html
Microsoft AntiSpyware (XP only): http://www.microsoft.com/athome/secu...e/default.mspx

VIRUS PROTECTION
AVG Free: http://www.majorgeeks.com/download886.html

VIRUS and SPYWARE DETECTION
Ewido (XP only - trial version): http://www.ewido.net/en/
HijackThis: http://www.majorgeeks.com/download3155.html

ONLINE HijackThis ANALYZERS
HijackThis analyzer #1: (website) http://www.hijackthis.de/index.php?langselect=english
HijackThis analyzer #2: (website) http://www.help2go.com/modules.php?name=HJTDetective
HijackThis analyzer #3: (website) http://hjt.iamnotageek.com/

ONLINE VIRUS SCAN WEBSITE
Trend Micro: http://housecall.trendmicro.com/

Miscellaneous Tools
Starter: http://www.snapfiles.com/download/dlstarter.html
Icon Restore: http://www.majorgeeks.com/download4125.html
Erunt (XP only): http://www.larshederer.homepage.t-online.de/erunt/
MemTest86: http://www.memtest86.com/
A-Squared: http://www.emsisoft.com/en/software/download/
CWShredder: http://www.softpedia.com/get/Intern...WShredder.shtml

Hello salty! welcome to daniweb community ... can you tell us about your system .. what type of blue screen do you see .. is there anything written on it ?? And which version of panda are you using .. platinum or titanium ??