From what I can tell from your Device Manager image, your SR300 drivers look okay. You have the new Windows Build 17134 ('April 2018 Update') installed. This Windows version, like some previous versions of Windows, has been causing problems for some users with a range of different hardware, including RealSense cameras.
So the problem is likely to be with the Windows version and not your camera drivers. The fact that your camera worked until the Windows update supports this theory.
Your options, then, include:
1. Try this solution a user called StevenSpringtab offered that he said worked for him in fixing his problems with Build 17134.
2. Roll your PC back to the previous version of Windows, if this is possible, and set your Windows update settings so that Windows needs to ask your permission before it installs updates such as new Windows builds.
3. Wait until Microsoft change something in Windows that makes the camera work again..