eM Client was working fine, but now it is saying the system cannot access the mailclient.exe file...?

NULL

Does a reboot of your computer help?

No. I reinstalled em client and it worked. Thanks for the reply.

I have marked this as solved, but can you tell me if you have done anything before this issue has occurred?

Jan

I did do a system update prior to that occurring

ok, thank you for this information.

Jan