XP freezes on startup, loading bar below Windows XP logo stops moving

The past few days I've been having issues with my desktop where when I turn it on, it runs through BIOS, and then begins to boot windows xp, but after maybe 10-15 seconds of loading windows xp, the loading bar beneath the Windows XP logo (it has three little blue boxes that move from left to right) will just stop moving. If I reset the computer it then asks to go into normal booting, or safe mode, safe mode booting always works but even when I system restore it doesnt seem to work. Out of maybe 50 times where the loading bar has crashed, its only properly loaded about two or three times. Any ideas what might be causing this?

Another update: I was able to get it booted normally again, the pattern I've noticed is that it seems way more likely to boot up after trying a system restore, and then leaving the computer powered off for a long period of time (like overnight). The error signature from the report says:

BCCode : 10000050 BCP1 : BB6FF000 BCP2 : 00000001 BCP3 : BD055833
BCP4 : 00000000 OSVer : 5_1_2600 SP : 3_0 Product : 768_1

In addition, the technical information lists these in the error report contents.

C:\DOCUME~1\Ch1ck3n\LOCALS~1\Temp\WER8d49.dir00\Mini080709-01.dmp
C:\DOCUME~1\Ch1ck3n\LOCALS~1\Temp\WER8d49.dir00\sysdata.xml

I'm not sure exactly what to look for in these to see what was the exact problem, but I hope this gives you guys some more ideas as to whats going on.