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#11
How do you know you cannot use Recovery partition? The disks should reinstall it.
It is not healthy to rely on Recovery to solve performance problems in the first instance. You should instead work through the Troubleshooting Steps for Windows 7 to isoloate and solve the problem.
If necessary post up each issue as it comes up in a thread here for help resolving it.
You should never be afraid to be the master of your PC instead of letting it remain a mystery that vexes you. You have the ability to communicate ably and in the manner that can get maximum support from us here, where we happen to specialize in getting a perfect Clean Reinstall. Everything you learn along the way puts you more in charge of your system and builds your confidence to learn more.
Start by reading through thoroughly Clean Reinstall - Factory OEM Windows 7
to ask back as many questions as you need. Everything you need is there including the latest official Win7 installer.