1 month later, the problem is still there. We've till the end of this month to come with a fix or we will have to migrate everything.
Anyone has some more tips? Here are the latest things we've tried:
- Disable BIOS powersave functions (performance profile, disable C-states)
- Removed any remaining software/drivers and run some removal tools
- Applied some hotfixes, didn't work so not relevant which ones
- Updated Proxmox and Virtio drivers to the latest versions
- Did some AV scans with multiple AV programs (deleted them after a full run)
- Driver verifier, but the BSOD only points to ntoskrnl.exe and not a specific driver/application
- Did another full memory test, disk benchmark/stresstest and CPU burn
- Tried single CPU core (someones tip)
- Disabled many Microsoft software like WSUS, Sharepoint (stuff that comes with SBS 2008 but isn't used)
Last few days the server crashed about 4 times a day, so it's a lot more now. We've allready moved the DNS, DHCP and fileserver part to a different server. The SBS server is only used for accounts and Exchange 2007 now, so the impact of a crash is minimal (just outlook goes offline for about 10 minutes). The APP server doesn't crash that often, only 2 times a month and mostly outside working hours.
Hopefully someone has any tips. I've never had a IT problem like this that I couldn't solve without a complete reinstall.