Excel always Not responding on workbooks

Hi I'm i work in an office and use Excel 2010 all day everyday.

But recently I have not been able to drag formulas, copy/paste, basically anything without it crashing and going to 'not responding'.

I have cut the size of my workbooks down drastically, taking away all formulas and storing them on the top row.

As this is a work computer I am restricted in the things I can and cannot do with the machine.

Is there anyway I can stop this from happening or at least reduce it! please!

If any further information is needed please ask!!!

Thanks

Hello!

I strongly recommend you to re-install Microsoft Office.

Regards,

Alvaro

Unfortunately I am unable to uninstall Excel on my work PC.

Sorry but do you have any other ideas?