well, if it was me I'd get rid of it as quickly as possible, but I have my own gripes about Norton. And unless you're sure that's what caused the problem, getting rid of it (of course, to replace it with something else) may not be a solution.
You didn't say whether you had done anything yourself in Explorer to move stuff around, or where you have your project located.
Check your recycle bin to see if it's all still in there. If it is, it means you somehow deleted it yourself. Check the other project folders to make sure you didn't accidentally drag it into one of those. And if Norton lets you, check its list of what it's 'quarantined/removed' and see if they're in there.