Even if you dont have that Adobe service running, there COULD still be a service interfering.  I had just read on the Smith Micro site that some programs can interfere with Poser's ability to run and/or install (I would provide a link, but I am too lazy to search for the page again).
So, try searching for a service that is interfering, and also play with your poser settings.  Since you say that P8 is crashing while rendering or deleting something from the scene, it could be a problem with Poser itself, and not the computer.  Either way, try both of these things (Poser settings are easier to test).
Have you tried deleting the preferences and uninstalling and reinstalling the program? If not, try doing that too.  The preferences are located in [User folder]> AppData> Roaming> Poser.  They are all contained within the 8.0 folder.  Just make a copy of that folder, and then delete the original.  (Use the copy to restore the settings in case resetting them doesnt work.)

Looking for interfering services:
Run through the list of Services and disable maybe 3 or 4 at a time.  Restart the computer, then test Poser.  If Poser suddenly works, then you know that one of those 3 or 4 services are interfering with the program, and just weed them out 1 by 1 until you find which one is causing a problem.  If there is no change in Poser though, then just re-enable those services you disabled, and disable another 3 or 4 and restart again.
After you go through all the services (that aren't Windows related) then you at least know that there arent any background programs screwing things up.  Then, it could be maybe some vid card driver settings, CPU problem, or a memory issue (unlikely in your case though, since you have 8GB, but that IS assuming you arent putting a heavy load on your RAM).

Check Poser settings:
Also, under Poser's Preferences, go to the Render tab and try lowering the Number of Threads and checking the Separate Processes checkbox (if not done already).
You can also go to the Misc tab and clear the Use External Binary Morph Targets option... I dont remember exactly what that one does, but I think it helped solve some issues with the program crashing due to slow read rates or something.  You could just try it... it wouldnt hurt.

If none of these help, then that is all I can suggest, unfortunately.  For anyone else who cant find the Adobe service, try these things too I guess.  Its possible that maybe you and I are having slightly different problems, but similar "symptoms".