We are running ASI Software's eCommerce site in IIS 7.0 on a Windows 2008 server. Sometimes the website will throw a Runtime Error (attached as a picture to this post). This error will sometimes go away on its own in a few minutes, or I will have to restart the worker process for the site to get it running again. I have found a lot of ASP errors in the event logs (also attached) and I'm not sure if these have anything to do with the problem. The problem has recently surfaced and the website code has not changed in years. We have recently added online backups through Jungle Disk but they are scheduled to run at 12AM nightly. The problem usually pops up during the day, so I'm not sure if the backups are the cause of the issue.
We have updated Windows components to the latest version, including .NET Framework and the latest service packs. Does anyone have any ideas on what might be causing these runtime errors and a way to permanently fix the problem?