My htc hero seems to have a virus or act like it do

Your phone could just be slow for starters... too many widgets or apps can cause the phone to slow down. Also when you have loads of messages on your phone this makes the phone slow down when going into texting mode.
There are a few things you can try, First of all, go onto the marketplace and download an app called "task killer". Once downloaded this app will give you the ability to close any apps that are running in the background, using up your phones processing and so slowing your phone down.
You could also try deleting your messages and any unwanted apps. Download Uninstaller, from the marketplace for making quick work of that.
Last but for a last resort terms, Go into settings and click Factory reset, this does wipe everything off your phone so make sure you back up your little android. This will be sure to solve any problems or clear any viruses.

You can use LEO Privacy to boost your storage, which it does, but I still have to go in the settings to clear things and hide your private images and videos. Really good app for phone protection.
LEO Privacy Applock Boost Hide Android Apps on Google Play