Red means they're not being shared.

Deleting them shouldn't hurt LW but, I wouldn't delete them until your sure what they are. If you delete them with LW they bypass the recycle bin and are removed from your hdd.

Open the file they're in outside of LW(in windows) and send them to the recycle bin. Then see if everything runs ok. Also do a virus scan just to be safe.

__________________
If it ain't broke, fix it till it is!