Yes, that the MS SQL Reporting Services contains a web frontend that listens on 80/443 by default.
Either remove it with these steps:
1.In Add/Remove programs
2.Click the 'Uninstall/Change' button for "SQL Server 2008 R2"
3.In the coming dialog, click 'Remove'
4.Click 'OK'
5.In the 'Select Instance' dialog, select the appropriate instance, and then click 'Next'
6.In the 'Select Features' dialog, please only select 'Reporting Services'
7.Then click 'Next' and 'Next' till the uninstalling process starting
Or if you use the reporting services for some reason you can change the port it listens on:
1. Go to Reporting Services Configuration Manager.
2. Go To Web Service URL tab, change the TCP Port other than 80/443
3. You report Manager URL will change accordingly. Now, use the new URL.