I have struggled for several months with a win7 64-bit Home Premium system that is plagued by background processes hanging. The hanging processes seem network related, i.e. mostly all browsers or email client will at some point hang. In Outlook, the sending will hang. Browsers will completely freeze.
The background process cannot be killed with Process Explorer. Task Manager will not open during the hang/freeze. The PC will not fully shut down and must be hard restarted. Some open programs, i.e. Word, will be unaffected during the freeze.
Background process hanging is often Windows Explorer, but still seems network-related. USB might be buggy (have had 2 BSODs related to USB) but reinstalled drivers etc. Not sure any effect.
This is an Intel DX58S02 system, 12 gig, 2 drives, 2-lan, Nvidea GTX 570 - New in Nov 2011. never really worked. Motherboard and memory were replaced by the builder. The original motherboard did not boot properly. I think they swapped an identical motherboard without reinstalling OS in Nov. - I don't remember reinstalling all the programs -- but my memory is fuzzy from the PC anguish.
I have followed a long and thorough process of problem isolation and fixes to no avail:
- Clean boot (non-MS services disabled)
- SFC scannow
- SafeMode with networking - inconclusive
- Mem test, chkdsk
- updated all Intel and Nvidea drivers, bios, chipset
- Upgraded network cables, new switch
- Disabled power management
- reinstalled USB hub controllers (got errors and a couple BSODs related to USB)
- Reinstalled Firefox, T-bird, tried Opera, IE
- Disabled lan auto-negotiate
- Disabled conflicting audio device driver
- removed network drive from reconnect at logon
- Switched from Avast to ESET nod32
When I reboot, I get a DHCP lease address event error, but seems to resolve satisfactorily.
Other Event Viewer items: WMI - InstanceModificationEvent; Distributed COM -- these don't seem related, but I am not a tech person.
Next step is to send it back to the assembler and reinstall OS, but do not relish setting up the entire system again -- i.e. the system works well enough to tease me along. Plus, I am not convinced a reinstall will find the issue.
I am happy to send any supporting files if requested.