due to these errors that keep popp'n up, i'm unable to access most of my computer goods. whenever i click on somethin, this dialog box pops up and says "C:Windows\explorer.exe: Buffer Overrun"-----"A Buffer Overrun has been detected which has corrupted the program's internal state. this program cannot safetly continue execution and must now be terminated". this usually happens everytime i click on an item linked to a program. I've reinstalled Windows Clean 5 times already, switched out memory sticks to see if thet were defective, and nothin. I jus upgraded ma computer so now i have,
a P4VP-mx p4v533-mx motherboard(new)

revious board:defective HP one.
Celeron 1.7 gig
512 megs DDR Memory
ATI Radeon 9200 128 meg AGP card
Windows XP+SP2+Blackice(firewall for EXTRA protection)
Norton Antivirus Corporate Edition(updated)
i dont know what is go'n on, seriously, this computer has been playing me a lot lately.... please help
PEACE