[AccessD] Slow Running Access 2007 Application – Dumb Question

All,

We have an Access 2007 application that runs nicely on all PCs except one.  When I look at the Task Manager on this PC, I can see several extra unknown processes using up both memory and CPU time.  I have always thought that if we removed the extra stuff from this PC, the Access application would run fine.

I recently exchanged e-mails with another person regarding the reason that PCs seem to slow down over time.  I had always thought that over time, malware, spyware, etc. is unknowingly installed and this is what makes a PC run slower and slower.
    
Here is what I received from another person regarding this issue.

“All types of processors gets damaged over time, it is generally caused because of electrical surges, Heat and Voltage.  This is common with all the electrical devices. They depreciate over time.”

Is this true?  Is this what makes PCs run slower over time?  

Just curious.

Thanks,
Brad