1. Just Login Into Your Clientarea Account.
https://clientarea.cheaphosting.pk/clientarea.php
2. Click On Services Menu > My Services.
3. Click on your active vps service for which you are going to login in vnc.
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4. Scroll down to vps below section to get vps management screen.
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5. Click on Rebuild Button to Reinstall / Rebuild your vps server.
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That's all.