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Others have had luck uninstalling it using the Windows system restore, but it is best javascript errors to not try this yourself unless you have some experience with working systems.
Once you've installed WordPress you will have one of WordPress' own standard, pretty ho-hum themes out of the box. In most cases, you'll want to find something a bit more unique beyond just sticking with the default.
If you paint 1 thing - make it the front door or the entrance porch. First impressions do count and this is where your visitor makes their choice for better or worse. While you're at it fix my website rusted fittings, cracked windows and wonky door bells.
In precisely the same confirmation email your nameservers came in, there will be a link to your own control panel for your site. Under that link in the email, there will be a username and password you will have to get into the control panel.
More about, is that a Java error could be a symptom of spyware or virus on your PC. If your files are moved or corrupted, you may want to look at your hard drive by scanning your computer for Spyware. You can get rid of Spyware immediately with an antivirus program.