ANDDownload Memtest86+ from this location here. Burn the ISO to a CD and boot the computer from the CD from a cold boot after leaving it off for an hour or more.
Ideally let it run for at least 7 passes / 6-8 hours. If errors appear before that you can stop that particular test. Any time Memtest86+ reports errors, it can be either bad RAM or a bad Mobo slot. Perform the test RAM sticks individually as well as all possible combinations. When you find a good one then test it in all slots. Post back with the results.
See this Guide to using Memtest 86+
Launch an elevated command prompt (StartOrb->All Programs->Accessories->Command Prompt, right click it and choose Run As Administrator) and type
chkdsk C: /R
hit enter and answer Yes “Y” when prompted and reboot.
Let it run all five stages. When complete check the log file in Event Viewer for results (Click the StartOrb and type event viewer and hit enter, expand Windows Logs and highlight / select Application, click Action on the menu bar and select Find and type chkdsk and hit enter.
TWo different computers, same network, similar errors...... check your router manufacturer for a firmware update and or try to swap out the router with a different one for testing (borrow one or pick one up at a store that has a liberal return policy in case it proves not to be an issue) I suspect that if it's not a software / firmware issue on the router than it may be something physical in the backplane or ICs.I tried to burn a CD with that Microsoft Offline Tool dealio and at the "Processing File" area of the stages it gives me an error saying it was unable to download (I am using a different PC for this yes.)
TWo different computers, same network, similar errors...... check your router manufacturer for a firmware update and or try to swap out the router with a different one for testing (borrow one or pick one up at a store that has a liberal return policy in case it proves not to be an issue) I suspect that if it's not a software / firmware issue on the router than it may be something physical in the backplane or ICs.