Input string was not in a correct format error from .net framework

Hi,

Can someone pls advise me how to get rid of the following error message
which appears every time when I plug in or unplug the comp and at start-up
when it is unplugged. I am just a regular user of Sony Vaio VGN-TZ150N with
Win Vista Business and Sony help directs me to Microsoft and Microsoft to
Sony and so on... so I'd appreciate help so I can start enjoying using my
brand new computer finally

"See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.FormatException: Input string was not in a correct format.
at System.Number.StringToNumber(String str, NumberStyles options,
NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseSingle(String value, NumberStyles options,
NumberFormatInfo numfmt)
at System.Single.Parse(String s, NumberStyles style, NumberFormatInfo info)
at System.Convert.ToSingle(String value)
at Sony.VAIO.Utility.OPS.BalloonClew.BalloonClew_Load (Object sender,
EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Mes sage& m)
at System.Windows.Forms.ContainerControl.WndProc(Mess age& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.O nMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.W ndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.312 (rtmLHS.050727-3100)
CodeBase:
file:///C:/Windows/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
OPT Drive Power Saving
Assembly Version: 2.0.0.15130
Win32 Version: 2.0.00.15130
CodeBase:
file:///C:/Program%20Files/Sony/VAIO%20Power%20Management/OPT%20Drive%20Power%20Saving.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.312 (rtmLHS.050727-3100)
CodeBase:
file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.312 (rtmLHS.050727-3100)
CodeBase:
file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.312 (rtmLHS.050727-3100)
CodeBase:
file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll"


--
/daissy