Unremovable threats found during safe boot with Active Directory Shell using SpyBot

Morning,

I have ran SPyBot in safe mode with Active Directory Shell afew times and I can't get rid of the following:

• Windows Explorer: [SBI $D20DA0AD] Recent file global history (Registry Key, nothing done) HKEY_USERS\S-1-5-21-844135832-2748499971-1089436459-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\RecentDocs

Category=Track ThreatLevel=2

• Cache: [SBI $BCACHE00] Browser: Cache (2) (Browser: Cache, nothing done)

Category=BrowserThreatLevel=1

• History: [SBI $BHISTORY] Browser: History (2) (Browser: History, nothing done)
  Category=Browser
  ThreatLevel=1
  Weblink=http://forums.spybot.info/forumdisplay.php?54

• History: [SBI $BHISTORY] Browser: History (2) (Browser: History, nothing done)

Category=Browser
ThreatLevel=1
Weblink=http://forums.spybot.info/forumdisplay.php?54

Can anyone tell me if these are serious i.e. being monitored etc please?