i have just downloaded windows 7 and it wont let me change the resolution size on my comp any sugestions plz x

Have you downloaded the latest graphics drivers?

It's better to update your display card driver, you can run Windows Updateto search if there is new driver update, You can try the following steps to update the driver, 1. Click the Start Button, type Device Manager in the Search bar and press "Enter". Click Continue if necessary.2. Double click to expand the "Display Adapters".3. Right click the display card, and choose "Update Driver software.." to check if there is new driver update. In addition, you can try to download the latest driver from your graphic card manufacture.If you get troulbe to update the driver, please let us know the detail model ofyour computer or the graphic card.I hope this can help you. John