No need to see a specialist. This is simple stuff....


Right click your desktop. Click personalize. Under aero theme, click windows 7.
The theme that looks like windows 98 is windows classic.

Alternatively, you can also try the Aero troubleshooter if you have problems turning Aero on.
Click then type "trouble" without the quotes. Click troubleshooting. Under appearance and personalization chose display Aero desktop effects.

As for the internet issues,
Is this a laptop or a desktop?

Under the troubleshooting window You can also use the connect to the internet troubleshooter under network and internet.