You could try quiting background programs like anti-virus scans , msn messanger , and other programs like that.

Also defrag your hard drive , unistall unwanted programs , disk clean up , Delete unwanted system recovery points etc etc

All these will slighty rise your fps but if its really unplayerble like you said its probably a upgrade for you.

( Kind of a useless post )

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“Love is all fun and games until someone loses an eye or gets pregnant”