Unable to clean all log files. ... Can I delete them manually?

[KirkKuykendall]

On 10.1 sp1, I log into manager and under Logs I choose "Delete all Logs".

I get this error:

Error while cleaning all logs. Unable to clean all log files.

The log folder is owned by the arcgisserver service account.

Can I just go into the file explorer and delete folders under
C:\arcgisserver\logs\<servername>  ?