My PC seems to be exhibiting some odd behaviour. When I played The Sims 2, the computer started to crash occasionally - which it never did before but it happened about 3 or 4 times in a week. When the computer rebooted, the screen would stay blank (it's an LG Flatron screen) but it had an orange-ish glow to it for about10 minutes and then eventually it would get back to normal. On one occasion the screen flashed up a BSoD but it went within a second so I couldn't read it and then it also came up with a BSoD regarding "Memory Management". This was my cue to reluctantly reinstall the OS (Windows Vista 32). After going through all the palaver of getting it loaded and updated I came to install Firefox and my usual raft of add-ons. But no, it wouldn't let me install a single add-on (theme or extension). I uninstalled/reinstalled Firefox about 10 times in all, tried various versions, removed profiles blah, blah... so, as the thought of being without Firefox was too much to bear (!) I decided to completely re-install Vista yet again...grrrr.... I did post this error on the Firefox forum but received no replies. Error: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsISafeOutputStream.finish]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsExtensionManager.js :: closeSafeFileOutputStream :: line 511" data: no] Source File: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsExtensionManager.js Line: 511 So here I am again having reinstalled Vista and, joy of joys, I've just managed to get a couple of themes installed in Firefox but it's now decided that it can't take anymore and I'm getting the same error as before...arrrggghhhh!! Why when I've completely reinstalled the OS?! Presumably this is a software/windows issue? Any ideas? I've yet to install the Sims as it takes forever and I don't want to go through it all if I end up having to replace hardware and install Vista yet again. I've run an Extended Test on my WD Hard Drive and all was OK and I've done a Windows Memory Diagnostic Test without issues. Any guesses as to what's happening here? Could The Sims thing be a hardware issue and the Firefox thing a software problem or could they be connected? My specs are: cpu: Intel® Core™2 Extreme Processor QX9650 m/b: Gigabyte GA-EP45T-DS3R RAM: OCZ DDR3 PC3-10666 Gold Edition (4GB) HDD: Western Digital 150Gb Raptor SATA (WD1500ADFD) Any help would be really appreciated!