can somebody tell me if i should worry about this?

the following is the output from a rootalyzer scan:

Folder, Invisible to Win32: C:\.y
Registry Key, Zero char in key name: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C4006A00-1BCA-6EB8-532ECF45EC7F3666}\{255813BC-4B14-0485-F918693C563F4A17}\{4E044D31-4FD1-E7BB-8A7B0B2E0CBCA924}
Registry Key, Zero char in key name: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{42E6D7B2-B1C8-2837-2B153136718EFEB8}\{8E0BC5B0-8FBD-4DC6-72B4724501FBC409}\{8BABC9F6-A6DF-6175-8337ACE301A74A27}
Registry Key, Zero char in key name: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{18D6E519-4C27-E4AD-074C5D1F171B40FB}\{8D7A772B-93EE-6905-4C751BA1B544AFC9}\{7029C73E-0020-BA9C-F3FADF03D99AF0E6}
Folder, No admin in ACL: C:\Documents and Settings\All Users\Application Data\Microsoft\OFFICE\DATA

can someone tell me if any of this is dangerous? :confused: