W2KPro-Memory Dump-ntoskrnl Problems

[frums]

Run W2KPro updated to SP4, AdAware, SpywareBlaster, AVG, DSL with Linksys Router, SPF.
SPF tells me that ntoskrnl.exe is blocked from accessing the internet occasionally, but I have full internet access all the time - as needed. SPF applications show that ntoskrnl is allowed full access - see below:

This error with the ntoskrnl will show up whenever I try to access my printer - it was uninstalled and then re-installed with correct drivers. If I right click on the printer in the CP\Printers folder, I will get a blue screen with the following error code:

STOP: 0x0000001E (0x80000003,0x8045558,0x00000000,0xBBE8ACCC)
Kmode exception not handled.
Address 80455548 base at 80400000, Date Stamp 434ec59-ntoskrnl.exe
Beginning Dump of Physical Memory.
Physical Dump Complete. Contact your system Administrator or technical support group.

AVG says the system is clean, Ad-Aware found Trojan Downloader - removed; Panda online found a couple of items which were cleaned; Trendmicro found Brillian Digital - removed and cleaned. System is clean from these scans repeated and nothing found.

Ram memory is 766MB - 516 free; Swap is 3721MB - 3490 free; Virt mem 4488MB - 4002MB free; Mb is Intel D845PESV.

Ran Hijack This from its own folder and have the following log:

Is this log clean? Any ideas on what is causing the Physical Memory Dump or the ntoskrnl error? Note: Even if the printer is unplugged from the computer, clicking on it\Properties in the Control Panel will cause the same problem. I have already changed the printer cable to another known good cable with the same results.

Any more info required, will be supplied.

frums