Windows Scheduled Task: Unable to start task. 0x80070005: Access is denied.

I have created a Scheduled Task in Windows XP SP3 as my user (full control). The task opens a Microsoft Access database on my C:\ drive and I have set it to run daily (07:05 am) before I log on. It is set to run as my network user and I have set the password.
When I check the Log, I can see that the task errored: "** ERROR ** Unable to start task. The specific error is: 0x80070005: Access is denied. Try using the Task page Browse button to locate the application."
When I am logged on, the Task runs as expected.
Does anyone have any ideas of how I can resolve this?

I think that Windows backup data is stored in the users local profile, and your backup software might be similar. In which case, it is most likely a permissions issue. For instance, having permissions to Delete but not modify a file could cause an issue like that, and clicking Apply might modify the file but click OK might overwrite it (delete).

Have you checked whether the "Run with the highest privileges" option is checked or not? If not then I will recommend you to tick mark it and see the output. It is usually required by one server and not for the other one. Just ensure to check mark this very important option when you are setting up the tasks and it will surely work for you.

Even I have checked that many users face similar kind of problem to run a batch file when they are using Windows Server 2008 task scheduler and then they end up meeting with an error code 0x80070005. To solve this issue it is very easy, instead of giving full path in the program or script textbox you just have to use the Start in field to put the folder that the batch file is or else simply select the ‘Run with highest privileges‘ check box and everything will start to work normally.