hidden file - not sure if its a virus or general pc registry problem

[extent]

PC issue with the registry-I am not sure if I am infected or if its an issue with the system (corrupt registry or something else). I have been using comodo with malwarebytes and avira. After a major scan, I am told that no malware was found, but one issue, a hidden object in the registry was:-

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DbgagD\1

I have been told that its possibly an infection, yet everything is running as normal, and both IE and Firefox are working, nothing happening out of the ordinary. The reason I thought I should post here is because this entry cannot even be viewed. When I highlight this value set to "1", I am told 'an error is preventing this key in being opened: the system cannot find the file specified'.

Changing the registry rights for Dbgag to admin makes no difference, nothing will set. Could the registry simply be corrupt? I have googled DbgagD up, I have posted elsewhere, but it does seem a common issue with users who think they are also infected. This registry entry does not seem to be linked as a the sole cause of any virus, but why cant it be viewed or edited? Could it be the result of a recent poor ms update thats having issues? I have also tried a system recovery with my vista disc, but I get a blue screen-so I have no option but to load back up as normal. I have noticed that blue screens on recovery may not always be likely the result of an infected system (it has happened to me on xp), but its still not a good sign. Perhaps only microsoft can tell me if this DbgagD registry entry is needed, corrupt or infected 100%, and what can cause the system not being able to find it-but any help would be great. Thanks.

[extent]

PC issue with the registry-I am not sure if I am infected or if its an issue with the system (corrupt registry or something else). I have been using comodo with malwarebytes and avira. After a major scan, I am told that no malware was found, but one issue, a hidden object in the registry was:-

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DbgagD\1

I have been told that its possibly an infection, yet everything is running as normal, and both IE and Firefox are working, nothing happening out of the ordinary. The reason I thought I should post here is because this entry cannot even be viewed. When I highlight this value set to "1", I am told 'an error is preventing this key in being opened: the system cannot find the file specified'.

Changing the registry rights for Dbgag to admin makes no difference, nothing will set. Could the registry simply be corrupt? I have googled DbgagD up, I have posted elsewhere, but it does seem a common issue with users who think they are also infected. This registry entry does not seem to be linked as a the sole cause of any virus, but why cant it be viewed or edited? Could it be the result of a recent poor ms update thats having issues? I have also tried a system recovery with my vista disc, but I get a blue screen-so I have no option but to load back up as normal. I have noticed that blue screens on recovery may not always be likely the result of an infected system (it has happened to me on xp), but its still not a good sign. Perhaps only microsoft can tell me if this DbgagD registry entry is needed, corrupt or infected 100%, and what can cause the system not being able to find it-but any help would be great. Thanks.

Update: Im not sure if this helps determine whether its an infection or not, but combofix shows the same registry entry as

--------------------- LOCKED REGISTRY KEYS ---------------------

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DbgagD\1*]

"value"="?\09\06\18\0b73Y"

[AdvancedSetup]

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