Windows 7 Windows7 doesnt boot properly event viewer log shows error

[rajindra786]

Hi I am using windwos7 on my dell laptop inspiron 5010, after starting it function erraticly as sometimes i am able to open I.Explr but most of the time it wont work and keeps on hanging.I am attaching log from evenviewer as follows , can anyone guide me to rectify please;

- <Event xmlns="Link Removed due to 404 Error">
- <System>
<Provider Name="SideBySide" />
<EventID Qualifiers="49409">80</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2012-06-01T03:11:39.000000000Z" />
<EventRecordID>58775</EventRecordID>
<Channel>Application</Channel>
<Computer>panchaldell-PC</Computer>
<Security />
</System>
- <EventData>
<Data>C:\windows\WinSxS\manifests\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_41e6975e2bd6f2b2.manifest</Data>
<Data>C:\windows\WinSxS\manifests\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_fa396087175ac9ac.manifest</Data>
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
<Data>C:\Program Files (x86)\Nero\Nero 9\Nero PhotoSnap\PhotoSnapViewer.exe.Manifest</Data>
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
<Data />
</EventData>
</Event>



- <Event xmlns="Link Removed due to 404 Error">
- <System>
<Provider Name="Microsoft-Windows-CAPI2" Guid="{5bbca4a8-b209-48dc-a8c7-b23d3e5216fb}" EventSourceName="Microsoft-Windows-CAPI2" />
<EventID Qualifiers="0">4107</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8080000000000000</Keywords>
<TimeCreated SystemTime="2012-06-01T03:11:31.030486600Z" />
<EventRecordID>58774</EventRecordID>
<Correlation />
<Execution ProcessID="1336" ThreadID="1424" />
<Channel>Application</Channel>
<Computer>panchaldell-PC</Computer>
<Security />
</System>
- <EventData>
<Data>http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab</Data>
<Data>A required certificate is not within its validity period when verifying against the current system clock or the timestamp in the signed file.</Data>
</EventData>
</Event>