Start here: http://sex-offender.vsp.virginia.gov/sor/faq.html#Question20
Then review the applicable Virginia Code Section here: http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+9.1-910
At minimum, pursuant to the Virginia Code, you will not be able to petition the court for removal from the registry until 15 years from your initial date of registration. This can go up to 25 years and depends upon the specific code section that you were found guilty under.
I strongly suggest that you speak with a local criminal defense attorney regarding your specific charges and your options down the road. Best of luck.