Infected Registry Keys and Value in Quarantine - Delete?

I have several Registry Keys and a Registry Value in my MBAM Quarantine that are infected by Adware. Should I delete them? I'm afraid to do so, seeing as the Registry is very very important.

Keys:

1. HKEY_CLASSES_ROOT\nowstarter.nowstarterctrl.1 (Adware.CWS)
2. HKEY_CLASSES_ROOT\CLSID\{072039ab-2117-4ed5-a85f-9b9eb903e021} (Adware.CWS)
3. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database\Distribution Units\{072039ab-2117-4ed5-a85f-9b9eb903e021} (Adware.CWS)
4. HKEY_CLASSES_ROOT\CLSID\{6f553c18-15e6-4e5e-8f44-add50de754ed} (Adware.CWS)
5. HKEY_CLASSES_ROOT\TypeLib\{0409743c-e5e3-4bdd-9ec7-eff622530282} (Adware.CWS)
6. HKEY_CLASSES_ROOT\Interface\{40722371-e24c-4b36-8e76-010bb6c7185b} (Adware.CWS)
7. HKEY_CLASSES_ROOT\Interface\{825c19d3-35ce-428f-876b-88e080466689} (Adware.CWS)
8. HKEY_CLASSES_ROOT\Interface\{e4e3e0f8-cd30-4380-8ce9-b96904bdefca} (Adware.PopCap)
9. HKEY_CLASSES_ROOT\Interface\{fe8a736f-4124-4d9c-b4b1-3b12381efabe} (Adware.PopCap)
10. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ModuleUsage\c:/windows/downloaded program files/nowstarter.ocx (Adware.CWS)
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database\Distribution Units\{df780f87-ff2b-4df8-92d0-73db16a1543a} (Adware.PopCap)
11. HKEY_CURRENT_USER\SOFTWARE\The Weather Channel (Adware.Hotbar)

Value:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs\C:\WINDOWS\Downloaded Program Files\NowStarter.ocx (Adware.CWS)


I also have a Data Item infected - in my log it says it is in the Quarantine, but it isn't.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL\CheckedValue (Hijack.System.Hidden) -> Bad: (0) Good: (1)

Oh yeah, and a file is infected too. Not sure about this one.
C:\WINDOWS\Downloaded Program Files\NowStarter.ocx (Adware.CWS)


All of them have been said to be Quarantined and deleted successfully. However, only the Registry Value, Keys and Files have been quarantined and they are not deleted yet. Where's the Data Item?