@ xladept,

Thank you for your interest Orrin, I appreciate it.

@ Logit,

Winon .... are you be disingenuous ?
I honestly don't know. Have done a Complete Computer Virus Scan. No problems. Then I did a CHKDSK (Looong procedure), No problems. Then I cleared the Cache and any related issues, but the problem as mention persists!
Could it maybe have something to do with the VBE Properties Settings relating to the Workbook itself?

I am running Office 2010 on Windows 7.

Thanks Guys.