Installing new memory resort to clean startup?

This maybe a very obvious question but here goes anyway...I'm about to upgrade my MacBook Pro from the standard 4GB memory to 8GB. My question is whether the switch will erase all of my current settings, apps & files on my computer and revert back to factory settings or 'Clean StartUp'.
I'm not worried about loosing any of my files, apps and/or settings,  I''m asking because I want to start fresh after I switch to the 8GB...I'm just not sure whether this will happen automatically or whether I will have to manually restore back to factory settings once the new memory is installed.
Also, any tips or advice to look out for when re-installing apps that have pre-existing serial numbers would also be very helpful (i.e Microsoft Office)
Thank You!!
M

shmonz,
no, replacing your memory modules will not affect the contents of your hard disk. The main concern is ensuring that static electricity is discharged before handling your memory modules, both new and old, since static electricity can functionally destroy them. Occasionally new memory modules exhibit defects that weren’t caught at the factory, so if you notice programs misbehaving after you install the new memory, try reïnstalling the old memory to see if the misbehavior disappears. If it does disappear, then contact the memory vendor to obtain replacements for your new memory.

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