Not able to upload now

Hello I just signed up to this forum and have read several threads with no solution to this problem that many others are experiencing. I bought an arduino/genuino 101 sparkfun kit from buyapi.ca Things were going fine and I managed to do all of the sample projects from the sparkfun site. After trying a few sketches on my own I can no longer upload any sketches at all. The board shows up as Arduino 101 Serial Monitor (COM3) in windows devices. Shows the same in device manager under ports. I can read the board info but every time I attempt to upload any sketch now, it compiles then fails.

Running Windows 7 ultimate 64 bit with Arduino 1.6.11 I get the following output

processing.app.debug.RunnerException

at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:159)

at cc.arduino.UploaderUtils.upload(UploaderUtils.java:78)

at processing.app.Sketch.upload(Sketch.java:1187)

at processing.app.Sketch.exportApplet(Sketch.java:1160)

at processing.app.Sketch.exportApplet(Sketch.java:1132)

at processing.app.Editor$DefaultExportHandler.run(Editor.java:2409)

at java.lang.Thread.run(Thread.java:745)

Caused by: processing.app.SerialException: Error touching serial port ‘com3’.

at processing.app.Serial.touchForCDCReset(Serial.java:87)

at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:143)

… 6 more

Caused by: jssc.SerialPortException: Port name -com3 ; Method name - openPort(); Exception type - Port not found.

at jssc.SerialPort.openPort(SerialPort.java:167)

at processing.app.Serial.touchForCDCReset(Serial.java:81)

… 7 more

Tried on my laptop that has Windows 10 Home 64 but I get

Starting download script…

Flashing is taking longer than expected

Try pressing the MASTER_RESET button

Error: Device is not responding

Error: Device is not responding

I’ve already tried different cables on both computers and get the same result.

Tried pressing MasterReset and Reset at various times no change.

Tried updating drivers on both computers but windows says the best driver is already selected.

Tried uninstalling, reinstalling, and updating IDE JAVA and Core files also.

Hoping that the board is not broken already and there is possible something else to try.

I was able to get my board working on my windows 10 laptop by upgrading to 1.6.12 with core 1.0.7 so it’s not a hardware issue. The IDE just seems unable to communicate with it on my desktop even though it shows up fine in device manager. I was able to upload from it using the dfu-util.exe program though as long as the board was in dfu mode.