Welcome to the windows7forums.
Was this a "clean" install or an upgrade?
Are you using the official RC directly from MS?
Are you running 32-bit or 64-bit
Do you recall installing any software which might have caused the slowdown.Try right-clicking on the taskbar and bring up Task Manager. then tell us how many processes are running and which one is using the most amount of memory.
We could also use some detailed specs on your hardware as well.
Go to Control Panel > Device Manager and look for any entry that has a yellow flag beside it
he manufacturer name and modem number of your PC, if applicable
Go to Start > Run, and type msinfo32, look under the Components section for hardware identification
Please fill out your computers specs in the User Control Panel here on the site as well. It will then appear next to your name. look at my posting and you'll see the drop-down arrow.