Have you tried cleaning up Windows 7 a bit to see if it will run faster? Let's help you:
How much RAM and what CPU does it have - click Start button, rightclick Computer, choose Properties to see. What is computer make/model?
Type "msconfig" into start search box, on Startup tab uncheck everything except AV and gadgets/stikynotes if you use them - the rest are freeloaders on your RAM/CPU, Startup time and can spy on you.
Startup Programs - Change
Use a lightweight free AV like MS Security Essentials with the Windows 7 firewall for best performance.
Microsoft Security Essentials
Download and install CCleaner then click Run Cleaner, and on the Registry tab "Scan for Issues" then Fix found Issues.
CCleaner - Free software downloads and software reviews - CNET Download.com
Make sure your Windows Updates are up to date. Check optional Updates for newer
drivers after enabling Auto-updating for Hardware here:
Automatically get recommended drivers and updates for your hardware
Next download and install Puran defragger, on Additional Operations tab check "Puran Intelligent Optimizer" option, select Boot Time defrag, restart to defrag to perfectly organize your HD.
Now test everything you use the machine for and report back if there is any improvement, along with your make/model and we can give you additional steps.