HELP! Please...my computer is on the fritz!!?

My computer's messed up completley and i can't fix it! WHen you turn it on this screen comes up and says there something wrong with the drive %26 BIOS. My computers date is also totally messed up. I put the BIOS back to the defalt settings but its still messed up. I also did a system restore..but nothing changed!!! I doenload Hijackthis too...here's my log file:

Logfile of Trend Micro HijackThis v2.0.2

Scan saved at 9:29:29 PM, on 2/5/2007

Platform: Windows XP SP2 (WinNT 5.01.2600)

MSIE: Internet Explorer v7.00 (7.00.6000.16574)

Boot mode: Safe mode with network support

Running processes:

C:\WINDOWS\System32\smss.exe

C:\WINDOWS\system32\winlogon.exe

C:\WINDOWS\system32\services.exe

C:\WINDOWS\system32\lsass.exe

C:\WINDOWS\system32\svchost.exe

C:\Program Files\Windows Defender\MsMpEng.exe

C:\WINDOWS\system32\svchost.exe

C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe

C:\WINDOWS\Explorer.EXE

C:\Program Files\Internet Explorer\iexplore.exe

C:\WINDOWS\system32\ctfmon.exe

C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=6...

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=5...

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://ie.redirect.hp.com/svs/rdr?TYPE=3...