Question

Im looking for a way to delete Windows restore points using C# perhaps by invoking WMI.

Any code snippet would be very helpful.

Answer 1

Touching on what Morten said you can use that API. WMI doesn’t provide a method to delete a Restore Point as far as I can tell. The SRRemoveRestorePoint can remove a restore point, provided you have the sequence number. You can get that through WMI. Here is my code to Remove a restore point.

[DllImport('Srclient.dll')] public static extern int SRRemoveRestorePoint(int index);  private void button1_Click(object sender, EventArgs e) {     int SeqNum = 335;     int intReturn = SRRemoveRestorePoint(SeqNum); } 

I just threw in 335 since that was the farthest one back as I could find on my system. Its likely that the count starts at 1 and keeps incrementing. so it isn’t as simple as just having an index like you would in an array.

As for getting the sequence numbers, I converted the code from Microsoft to C# which will give you that info. Be sure to add System.Management as a reference. Otherwise this code won’t work right.

    private void EnumRestorePoints()     {         System.Management.ManagementClass objClass = new System.Management.ManagementClass('\\\\.\\root\\default', 'systemrestore', new System.Management.ObjectGetOptions());         System.Management.ManagementObjectCollection objCol = objClass.GetInstances();          StringBuilder Results = new StringBuilder();         foreach (System.Management.ManagementObject objItem in objCol)         {             Results.AppendLine((string)objItem['description'] + Convert.ToChar(9) + ((uint)objItem['sequencenumber']).ToString());         }          MessageBox.Show(Results.ToString());     } 

I tested this on my box (Vista by the way) and it worked without issue. Also have to be running as Admin, but I think you figured that.