Multiple problems in 2003R2 DC

from days ago single server has been experiencing multitude of problems tht can't track, example:

1) works ok ~4 hrs, users start losing ability access productivity program on server, file access(does weird thing, allows 1 user , others time out), rdp access, point server unusable , needs either remote reboot using pstools or hard reboot. local console "hangs", takes minutes respond clicks , keyboard, etc, 0% cpu usage , 1.5gb free ram , ~50mb free kernel, also, no hdd activity(and no errors or warning logged in event log)

2) after restarts, checking event logs(and not making sense of errors logged keep changing) , following support site articles don't solve them or break more stuff entire domain unaccesible, sysvol , netlogon shares missing journal wrap errors(i enabled wrap automatic restore , deleted contents of sysvol folder...), cannot open policy, etc.

what's weird logs dns errors(when checking support event indicated pte exhaustion, i'm not using /3gb), ntfrs errors io errors(but drives ok) , looks server internally out of resources or kernel pointers point of server death.

i've ran chkdsk /f andreturned tons of logical erros due hard reboots, nothing apart , doesn't fix anything

3) server updated day(and kept that), drivers , fw updated, hardware has been checked , there no errors, hw poweredge 2970, 2003r2 32b.

4) server has dc, exchange 2003, iis web exchange, apache app server, php, db servers(progress , sql), app server, backup server, antivirus server, file server

5) i've changed onboard nics different addon one(with different chipset), solved problem 2 days, came vengeance

 

i'm.. quite baffled on this.... i've done authoritative system state restore , works less , gives tons of errors... have no idea for, seems everytime boots gives different error , following support docs breaks more

 

how long dates backup used?

are sure have not restored snapshot?

have microsoft article:

http://support.microsoft.com/kb/216993

 

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